31230125 has 16 divisors (see below), whose sum is σ = 39132912. Its totient is φ = 24883200.

The previous prime is 31230079. The next prime is 31230163. The reversal of 31230125 is 52103213.

31230125 = T₂₀₆ + T₂₀₇ + ... + T₅₈₀.

It can be written as a sum of positive squares in 8 ways, for example, as 6568969 + 24661156 = 2563^2 + 4966^2 .

It is not a de Polignac number, because 31230125 - 2⁶ = 31230061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53837 + ... + 54413.

It is an arithmetic number, because the mean of its divisors is an integer number (2445807).

Almost surely, 2^31230125 is an apocalyptic number.

It is an amenable number.

31230125 is a deficient number, since it is larger than the sum of its proper divisors (7902787).

31230125 is an equidigital number, since it uses as much as digits as its factorization.

31230125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 31230125 is about 5588.3919869673. The cubic root of 31230125 is about 314.9134724966.

Adding to 31230125 its reverse (52103213), we get a palindrome (83333338).

The spelling of 31230125 in words is "thirty-one million, two hundred thirty thousand, one hundred twenty-five".